He WONT SLEEP

Has anyone else’s 6 month old drastically flipped their sleeping habits recently? My son will not fricken sleep. He fights it so hard, screams, pushes me away, and then he will only sleep for an hour or less at a time! I am so exhausted and at my wits end. I’m getting woken up every hour and I have to rock him back to sleep while he fights me. I feel delusional.